问题
I am trying to read a file stored on GCS bucket using on premise standalone spark job in java. I have configured SparkContext with all necessary spark configuration. I am getting following error:
at com.vr.HadoopSample.main(HadoopSample.java:78)
java.io.IOException: Error getting access token from metadata server at: http://metadata/computeMetadata/v1/instance/service-accounts/default/token
at com.google.cloud.hadoop.util.CredentialFactory.getCredentialFromMetadataServiceAccount(CredentialFactory.java:208)
at com.google.cloud.hadoop.util.CredentialConfiguration.getCredential(CredentialConfiguration.java:70)
at com.google.cloud.hadoop.fs.gcs.GoogleHadoopFileSystemBase.configure(GoogleHadoopFileSystemBase.java:1825)
at com.google.cloud.hadoop.fs.gcs.GoogleHadoopFileSystemBase.initialize(GoogleHadoopFileSystemBase.java:1012)
at com.google.cloud.hadoop.fs.gcs.GoogleHadoopFileSystemBase.initialize(GoogleHadoopFileSystemBase.java:975)
at org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:2811)
at org.apache.hadoop.fs.FileSystem.access$200(FileSystem.java:100)
at org.apache.hadoop.fs.FileSystem$Cache.getInternal(FileSystem.java:2848)
at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:2830)
at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:389)
at org.apache.hadoop.fs.Path.getFileSystem(Path.java:356)
at org.apache.hadoop.mapred.FileInputFormat.singleThreadedListStatus(FileInputFormat.java:265)
at org.apache.hadoop.mapred.FileInputFormat.listStatus(FileInputFormat.java:236)
at org.apache.hadoop.mapred.FileInputFormat.getSplits(FileInputFormat.java:322)
at org.apache.spark.rdd.HadoopRDD.getPartitions(HadoopRDD.scala:194)
at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:252)
at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:250)
at scala.Option.getOrElse(Option.scala:120)
at org.apache.spark.rdd.RDD.partitions(RDD.scala:250)
at org.apache.spark.rdd.MapPartitionsRDD.getPartitions(MapPartitionsRDD.scala:35)
at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:252)
at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:250)
at scala.Option.getOrElse(Option.scala:120)
at org.apache.spark.rdd.RDD.partitions(RDD.scala:250)
at org.apache.spark.SparkContext.runJob(SparkContext.scala:2087)
at org.apache.spark.rdd.RDD$$anonfun$foreach$1.apply(RDD.scala:918)
at org.apache.spark.rdd.RDD$$anonfun$foreach$1.apply(RDD.scala:916)
at org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:151)
at org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:112)
at org.apache.spark.rdd.RDD.withScope(RDD.scala:362)
at org.apache.spark.rdd.RDD.foreach(RDD.scala:916)
at org.apache.spark.api.java.JavaRDDLike$class.foreach(JavaRDDLike.scala:351)
at org.apache.spark.api.java.AbstractJavaRDDLike.foreach(JavaRDDLike.scala:45)
at com.vr.HadoopSample.main(HadoopSample.java:78)
Caused by: java.net.UnknownHostException: metadata
at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at sun.net.NetworkClient.doConnect(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient.<init>(Unknown Source)
at sun.net.www.http.HttpClient.New(Unknown Source)
at sun.net.www.http.HttpClient.New(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.connect(Unknown Source)
at com.google.api.client.http.javanet.NetHttpRequest.execute(NetHttpRequest.java:93)
at com.google.api.client.http.HttpRequest.execute(HttpRequest.java:972)
at com.google.cloud.hadoop.util.CredentialFactory$ComputeCredentialWithRetry.executeRefreshToken(CredentialFactory.java:158)
at com.google.api.client.auth.oauth2.Credential.refreshToken(Credential.java:489)
at com.google.cloud.hadoop.util.CredentialFactory.getCredentialFromMetadataServiceAccount(CredentialFactory.java:206)
... 33 more
17/10/10 11:34:24 INFO SparkContext: Invoking stop() from shutdown hook
17/10/10 11:34:24 INFO SparkUI: Stopped Spark web UI at http://169.254.189.252:4040
17/10/10 11:34:24 INFO MapOutputTrackerMasterEndpoint: MapOutputTrackerMasterEndpoint stopped!
17/10/10 11:34:24 INFO MemoryStore: MemoryStore cleared
Any Help would be appreciated.
I have configured SparkConf using below properties:
<property>
<name>fs.gs.impl</name>
<value>com.google.cloud.hadoop.fs.gcs.GoogleHadoopFileSystem</value>
</property>
<property>
<name>fs.gs.project.id</name>
<value>your-ascii-google-project-id</value>
</property>
<property>
<name>fs.gs.system.bucket</name>
<value>some-bucket-your-project-owns</value>
</property>
<property>
<name>fs.gs.working.dir</name>
<value>/</value>
</property>
<property>
<name>fs.gs.auth.service.account.enable</name>
<value>true</value>
</property>
<property>
<name>fs.gs.auth.service.account.email</name>
<value>your-service-account-email@developer.gserviceaccount.com</value>
</property>
<property>
<name>fs.gs.auth.service.account.keyfile</name>
<value>/path/to/hadoop/conf/gcskey.p12</value>
</property>
I have followed instructions using Google Cloud Storage connector. I have not installed Spark on my machine but have used all its libraries in eclipse. Any Help would be greatly appreciated. I am not able to move ahead. Thanks.
回答1:
As written in Cloud Storage Connector installation documentation, these properties should be specified in conf/core-site.xml file.
If you are configuring them directly through Spark (programmatically or adding them to spark-defaults.conf) then you need to add spark.hadoop. prefix to all of them.
来源：https://stackoverflow.com/questions/46659757/reading-a-gcs-file-using-standalone-on-premise-spark-java-program